43586849021 has 2 divisors, whose sum is σ = 43586849022. Its totient is φ = 43586849020.

The previous prime is 43586849011. The next prime is 43586849057. The reversal of 43586849021 is 12094868534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23447265625 + 20139583396 = 153125^2 + 141914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43586849021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43586849011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21793424510 + 21793424511.

It is an arithmetic number, because the mean of its divisors is an integer number (21793424511).

Almost surely, 2^43586849021 is an apocalyptic number.

It is an amenable number.

43586849021 is a deficient number, since it is larger than the sum of its proper divisors (1).

43586849021 is an equidigital number, since it uses as much as digits as its factorization.

43586849021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 43586849021 in words is "forty-three billion, five hundred eighty-six million, eight hundred forty-nine thousand, twenty-one".